Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique

Université De Rennes 1

Université De Rennes I

Centre National De La Recherche Scientifique

Europlasma

Meryl Brothier

Pierre Estubier

Jerome Allenou

Francois Charollais

Johann Soyez

Olivier Tougait

Mathieu Pasturel

Henri Noel

Xaviere Iltis

Carine Ablitzer

Maxime Labrot

Philippe Rodriguez

Philippe Sornay

Jean-Marie Seiler

Dominique Moulinier

Jean-Pierre Turchet

Pierre Matheron

Ulysse Michon

Julien Comte

Patrick Baussand

Patrick Gramondi

Julien Bricout

Arnaud Benedetti

Sylvie Rouge

Jean-Claude Gelin

A device for transferring a given powder or a mixture of given powders contained in a container including a side wall and at least one discharge opening, the container with axisymmetric shape having an axis of rotation being arranged in the transfer device such that the discharge opening thereof is located in a lower portion of the container, the transfer device including rotating the container about the axis thereof, on which the discharge opening is located and control for controlling the rotation such that the to rotation imposes on at least one portion of the side wall of the container, referred to as movable portion, a first moving phase wherein an acceleration no lower than a minimum acceleration is capable of causing the powder to slide relative to the movable portion.

Powder-transfer device with improved flow

The invention relates to a jet spouted bed reactor, comprising a cylindrical area, a gas injection pipe at the base of the cylindrical area, and a transition area, connecting the upper end of the pipe to the base of the cylindrical area, this transition area having a convex profile in a plane extending through the axis (YY') of flow of a fluid in the pipe.

Jet spouted bed type reactor device having a specific profile for CVD

The invention relates to a powder of an alloy based on uranium and molybdenum in a metastable &#x3b3; phase, which is formed of particles which have an elongation index at least equal to 1.1, a non-zero closed porosity value and which are composed of grains having a molybdenum content, for which the variations within the same grain are of at most 1% by mass. It also relates to a method allowing preparation of this alloy powder as well as to the use of said powder for manufacturing nuclear fuels and targets for producing radioisotopes. Applications: Manufacturing of nuclear fuels, notably for experiment nuclear reactors; manufacturing of targets for producing radioisotopes, notably for the medical industry.

Powder of an alloy based on uranium and on molybdenum useful for manufacturing nuclear fuels and targets intended for producing radioisotopes

A composition filled with actinide powder, comprising an organic matrix and an actinide powder or a mixture of actinide powders, comprises at least: a plasticizer comprising an alkane whose longest radical chain comprises at least a few tens of carbon atoms and is in a volume content of between 20% and 70% of the total volume of the organic compounds alone; a binder comprising at least one polyolefinic polymer and which is in a volume content of between 20% and 50% of the total volume of the organic compounds alone; a dispersant comprising a carboxylic acid or salts thereof, the volume content of which is less than 10% of the total volume of the organic compounds alone; said actinide powder or said mixture of actinide powders represent between 40% and 65% of the volume of the filled matrix.

Composition filled with polyolefin and actinide powder

A method for preparing a powder of an alloy based on uranium and molybdenum in a metastable &#x3b3; phase is provided, which comprises:

Method for preparing a powder of an alloy based on uranium and molybdenum

The measurement is carried out by a device of two non- dissociable measurement chains resulting in a continuous measurement which is representative of the total concentration of tars (even as traces) of a hot gas. It involves coupling of methods including one, SPME/GC/MS/PID, which is discontinuous and a priori partial, the other, PID, which is continuous but difficult to interpret alone. It is based on on-line processing of the elements transmitted by each of the measurement methods used. A tar generator () allows calibration of the apparatuses and calculation of the different coefficients required.

Device and method for coupled measurements for globally and continuously tracking traces of tars present in a gas flow

The measurement is conducted by means of thermogravimetric scales () bearing at one end of the beam () a catalyst body () for catalysing a coking reaction of the tars present in the gas state. Precautions are taken in order to ensure homogeneity and regularity of the sampled gas flow and to guarantee predominant catalysis on the catalytic body (), the weight increase of which gives the weight of the deposited coke and indirectly the content of tars present in the gas state in the gas to be measured. A calorimetric device () for analyzing gases from the coking of the tars provides a complementary and/or additional measurement. The solid tars are filtered beforehand, but their content may be measured by an auxiliary device. Possible application to analyzing gases from biomass.

Device and method for continuous measurement of concentrations of tars in a gas flow

A device for purification of a gas flow containing condensable vapors including a shell () defining a sealed volume, a cooler to quench the gas flow, a rotating assembly () having a rotor () and a cylindrical separation and filtration skirt () composed of serrated circular rings () mounted on the rotor and rotating with it; a support tube () mounted on the rotor () and carrying a turbulator-scraper device () a cylindrical electrode () surrounding the separation and filtration skirt () and a central counter-electrode () to create an electrostatic field in the shell (), a purified gas outlet tube, a condensates outlet pipe () and impact separation plates () fixed on the rings of the skirt.

Device for purification of a gas flow containing condensable vapours

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Aix en Provence, France

Meryl Brothier